Improvement in turning-lathes for turning scythe-snaths



AN- PHUTD-L ITHO. C0. NY. (OSBORNES PROCESS) PATENT @FridaA 4SPENCERHINTON, 0F JACKSON, MICHIGAN, ASSIGNOR T() WITHINGTON, COOLEY St CO., OFSAME PLACE.

IMPROVEMENT IN TURNlNG-LATHE S FOR TURNING SCYTHE-SNATHS.

To all whom 'it may concern:

Be it known that I, SPENCER HINTON, of Jackson, in the county of Jacksonand State of Michigan, have invented a new and Improved Machine forTurning Scythe-Snaths and other Bent Sticks; and I do hereby declarethat the following is a full, clear, and exact description thereof,which will enable those skilled in the art to make and use the same,reference being had to the accompanying drawings, forming part of thisspecification, in which-- Figure l is a perspective view. Fig. 2 is aback view of the plate G and the parts attached thereto, the plate Hbeing removed. Fig. 3 is a side view f the portions shown in Fig. 2.Fig. 4 is a rear view of the plate H detached from the other portions.Figs. 5 and 6 are views of the two gages with the feedknife andcutting-knife.

Similar letters of reference indicate corresponding parts.

The object of this invention is to obtain a machine for turningseythe-snaths and other bent sticks with f'acility and in a perfectmanner.

It It, Figs. l and 2, is the foundation, to which are attached the twostandards Q Q' provided at their upper ends, respectively, with bearingso o. The standard Q', with the bearing o, is cast with the foundation ItIt; but the standard Q is cast separately and bolted to the foundation,as shown at V.

G, Figs. l and 2, is one of a pair of circular plates, with hollowjournals J and pulley P at one side, and grooves plan ed and the recessat the middle turned (for gage) at the opposite side. H, Fig. 4, is theother of the pair of plates, with hollow journals J' on one side, andgrooves W planed and the recess at middle turned (for gage) into theopposite side. These plates are fastened in position by means of thebolts y and the pieces L. (See Fig. 5.) The pieces L (see Figs. 1,2, and3) are placed between the plates and diametrically opposite each other,the bolts y passing through the plates G H and pieces L.

The plates G H are separated by pieces L L far enough to allow the gageand knife holder and the gage and feedknife holder to play freely to andfrom the center of machine between them, the ways YV on the gagesfitting into the grooves W planed into the plates G H on the inside.

VThe gage and knife holders, as seen in Fig. 2, are pressed as near thecenter as the machine will allow, and are held in this position by thespiral springs S until, being put to work, the gages are forced apart bythe stick. The springs, bearing between the back end of gage and thepieces L L, are held in position by the studs S', Figs. 3 and 4, whichplay freely through the holes c in the pieces L as the gages move towardand from the center of the machine.

The cutting-knife is seen in position at K, Fig. 6, and the feed-knifeis seen in position at F, Fig. l.

rEhe machine is set in motion by means of a belt passed over the pulleyl? and attached to some power. rIhe stick to be turned is introducedinto the hollow journal J on the side of machine opposite pulley,between the gages B B. The feed-knife F, which is set into a spiralgroove cut in the gage, operates to draw the stick into the machine, thecutting-knife K at the same time reducing the end of stick to therequired size as it is forced through to the opposite side of gage orknife holder. The gage B, being set a triiie lower or nearer the centerof machine than the knife K, and coming in contact with the turnedsurface, is raised or forced from the center and against the spiralsprings S S. Consequently, as the knife continues to cut on a circle atrifle longer than that which the gage bears against, the stick istapering from end to end. At the same time all the working parts beingin one and the saine vertical plane, or nearly so-namely, thefeed-knife, cutting-knife, and gage-andthe journals so near together andturned in the form of a bugle mouth at the outer ends, al-

low a crooked stick to pass through as though it were straight, theportion of stick covered by working parts being to all intents andpurposes straight.

Another mode of applying the gage is to place the knife a trie lower ornearer the cen ter of rotation than the side of gage next where thestick is introduced, thus leaving the gage to bear on the rough stick,the knife eutting enough below to clean the stick of all imperfections.At same time the shape of turnout stick is as was the shape of roughstick, as regards its taper, yet turned round, as in the other case, thetaper being governed by the taper 0f the general average of theprominent parts, and not by the general average of the whole stick.

The knif'e used for cutting has both its edges turned up, and is in theshape of a shallow gouge, so as not to leave marks from the corners.

It is necessary that the two persons (one on either side of the machine)holding the stick to be turned keep the part being worked upon in such aposition as that the tangent to the curve at the point being worked willbe at right angles to the plane of rotation of the working parts.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The two plates G H, with hollow buglemouthedjournals J J respectively, on each, and a pulley, P, on one, G, fastenedtogether in such a position, with the pieces L L between them anddiametrically opposite to each other, so that the journals J J will bein line with each other and retain certain gage and knife holdersbetween them, substantially as and for the purpose specified.

2. The two gage and knife holders B B, moving toward and from the centerof rotation between the plates G H, substantially in the manner as andfor the'purpose set forth.

3. So fitting the ends of gages where the parts of the circlepass eachother (when the gages are closed up, as in Fig. l) into each other thatas they open they will tend nearer to form a complete circle, and whenfully open the circle will bc complete, as shown in Figs. 3 and 4.

4. Attaching the knife and feed-knife to gage and knife holders, asherein described.

SPENCER HINTON.

Vitnesses:

GEO. D. WALooTT, L. A. PENNOYER.

